<%@ page language="java" pageEncoding="UTF-8" %>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">
    <title>登陆</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <link rel="stylesheet" href="${pageContext.request.contextPath }/css/login.css"/>
    <script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery.min.js"></script>
    <script type="text/javascript" src="${pageContext.request.contextPath }/js/login.js"></script>
    <style>
        #canvas{
            margin-top: 1px;
            display: block;
            float: right;
            margin-right: 20px;
        }
    </style>
</head>

<body>
<div id="slider-title">
    <img src="${pageContext.request.contextPath }/img/logo.png" height="45" width="45"/>
    <div id="title-logo">企业网盘</div>
    <div>
        <input type="button" onclick="return adminLogin()" value="管理员登陆" class="adminsubmit">
    </div>
</div>
<div class="slider">
    <ul class="slider-main">
        <li class="slider-panel"><a href="#"><img
                alt="yun网盘" title="yun网盘" src="${pageContext.request.contextPath }/img/a.jpg"></a></li>
        <li class="slider-panel"><a href="#"><img
                alt="yun网盘" src="${pageContext.request.contextPath }/img/d.jpg"></a></li>
        <li class="slider-panel"><a href="#"><img
                alt="yun网盘" title="yun网盘" src="${pageContext.request.contextPath }/img/g.jpg"></a></li>
        <li class="slider-panel"><a href="#"><img
                alt="yun网盘" title="yun网盘" src="${pageContext.request.contextPath }/img/f.jpg"></a></li>
    </ul>
    <div class="slider-extra">
        <ul class="slider-nav">
            <li class="slider-item"></li>
            <li class="slider-item"></li>
            <li class="slider-item"></li>
            <li class="slider-item"></li>
        </ul>
    </div>
</div>

<div id="login">
    <form id="pp" action="user/login.action" method="post" name="ps">
        <div id="form-title">账号密码登录</div>
        <label for="name"></label><input type="text" placeholder="用户名" name="username" class="login-input" id="name"/>
        <label>
            <input type="password" placeholder="密码" name="password" class="login-input"/>
        </label>
        <br/>
        <div style="color: crimson;font-size: 10px"><%=request.getAttribute("msg") == null ? "" : request.getAttribute("msg") %>
        </div>
        <label>
            <input type="text" placeholder="请输入验证码" name="yanzhengma" class="input-val" style="width:180px;"/>
        </label>
        <canvas id="canvas" height="36" width="90"></canvas>
        <br/>
        <div style="color: crimson;font-size: 10px"><%=request.getAttribute("checkerror") == null ? "" : request.getAttribute("checkerror") %>
        </div>
        <!-- 			<input type="checkbox" class="input" /><span class="ck_text">下次自动登录</span> -->
        <input type="button" value="登录" class="login-btn"/><br/>
        <!-- 			<div id="a_div"> -->
        <!-- 				<a href="#" class="a_login">登录遇到问题</a> <a class="a_login" href="#" -->
        <!-- 					id="phone">海外手机号</a> -->
        <!-- 			</div> -->
        <div id="bottom">
            <div id="inner">
                <div class="inner">
                    <a href="#" class="a_inner">扫一扫登录</a>
                </div>
                <div class="img-login">
                    <a href="${pageContext.request.contextPath}/api/github/githubLogin.action"><img src="${pageContext.request.contextPath }/img/github.jpg" width="25" height="25"></a>
                </div>

                <div>
                    <input type="button" onclick="return register()" value="立即注册" class="submit">
                </div>

                <div class="clearFloat"></div>
            </div>
        </div>
    </form>
</div>
</body>
<script type="text/javascript">
    function register() {
        window.location.href = "user/goRegister.action";
        return false;
    }

    function adminLogin() {
        window.location.href = "admin/adminLogin.action";
        return false;
    }

    //生成并渲染出验证码图形
    function draw(show_num) {
        var canvas_width = $('#canvas').width();
        var canvas_height = $('#canvas').height();
        var canvas = document.getElementById("canvas");//获取到canvas的对象，演员
        var context = canvas.getContext("2d");//获取到canvas画图的环境，演员表演的舞台
        canvas.width = canvas_width;
        canvas.height = canvas_height;
        var sCode = "a,b,c,d,e,f,g,h,i,j,k,m,n,p,q,r,s,t,u,v,w,x,y,z,A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0";
        var aCode = sCode.split(",");
        var aLength = aCode.length;//获取到数组的长度
        for (var i = 0; i < 4; i++) { //这里的for循环可以控制验证码位数（如果想显示6位数，4改成6即可）
            var j = Math.floor(Math.random() * aLength);//获取到随机的索引值
            // var deg = Math.random() * 30 * Math.PI / 180;//产生0~30之间的随机弧度
            var deg = Math.random() - 0.5; //产生一个随机弧度
            var txt = aCode[j];//得到随机的一个内容
            show_num[i] = txt.toLowerCase();
            var x = 10 + i * 20;//文字在canvas上的x坐标
            var y = 20 + Math.random() * 8;//文字在canvas上的y坐标
            context.font = "bold 23px 微软雅黑";
            context.translate(x, y);
            context.rotate(deg);
            context.fillStyle = randomColor();
            context.fillText(txt, 0, 0);
            context.rotate(-deg);
            context.translate(-x, -y);
        }
        for (var i = 0; i <= 5; i++) { //验证码上显示线条
            context.strokeStyle = randomColor();
            context.beginPath();
            context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height);
            context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height);
            context.stroke();
        }
        for (var i = 0; i <= 30; i++) { //验证码上显示小点
            context.strokeStyle = randomColor();
            context.beginPath();
            var x = Math.random() * canvas_width;
            var y = Math.random() * canvas_height;
            context.moveTo(x, y);
            context.lineTo(x + 1, y + 1);
            context.stroke();
        }
    }
    //得到随机的颜色值
    function randomColor() {
        var r = Math.floor(Math.random() * 256);
        var g = Math.floor(Math.random() * 256);
        var b = Math.floor(Math.random() * 256);
        return "rgb(" + r + "," + g + "," + b + ")";
    }
    $(function(){
        var show_num = [];
        draw(show_num);
        $("#canvas").on('click',function(){
            draw(show_num);
        })
        $(".login-btn").on('click',function(){
            var val = $(".input-val").val().toLowerCase();
            var num = show_num.join("");
            if(val==''){
                alert('请输入验证码！');

            }else if(val == num){
                document.ps.submit();
            }else{
                alert('验证码错误！请重新输入！');

                $(".input-val").val('');
                draw(show_num);
            }
        })
    })

</script>
</html>
